Adding upstream version 115.7.0esr.upstream/115.7.0esrupstream

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

7 files changed, 770 insertions, 0 deletions

diff --git a/caps/tests/gtest/TestBackgroundThreadPrincipal.cpp b/caps/tests/gtest/TestBackgroundThreadPrincipal.cpp
new file mode 100644
index 0000000000..82c7b15757
--- /dev/null
+++ b/caps/tests/gtest/TestBackgroundThreadPrincipal.cpp
@@ -0,0 +1,94 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/gtest/MozAssertions.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/ContentPrincipal.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/ipc/BackgroundUtils.h"
+#include "mozilla/ipc/PBackgroundSharedTypes.h"
+#include "nsIEventTarget.h"
+#include "nsISerialEventTarget.h"
+#include "nsIURIMutator.h"
+#include "nsNetUtil.h"
+#include "nsPrintfCString.h"
+#include "nsThreadUtils.h"
+
+namespace mozilla {
+
+template <typename F>
+void RunOnBackgroundThread(F&& aFunction) {
+  nsCOMPtr<nsISerialEventTarget> backgroundQueue;
+  ASSERT_NS_SUCCEEDED(NS_CreateBackgroundTaskQueue(
+      "RunOnBackgroundThread", getter_AddRefs(backgroundQueue)));
+  ASSERT_NS_SUCCEEDED(NS_DispatchAndSpinEventLoopUntilComplete(
+      "RunOnBackgroundThread"_ns, backgroundQueue,
+      NS_NewRunnableFunction("RunOnBackgroundThread",
+                             std::forward<F>(aFunction))));
+}
+
+TEST(BackgroundThreadPrincipal, CreateContent)
+{
+  RunOnBackgroundThread([] {
+    nsCOMPtr<nsIURI> contentURI;
+    ASSERT_NS_SUCCEEDED(NS_NewURI(getter_AddRefs(contentURI),
+                                  "http://subdomain.example.com:8000"_ns));
+    RefPtr<BasePrincipal> contentPrincipal =
+        BasePrincipal::CreateContentPrincipal(contentURI, OriginAttributes());
+    EXPECT_TRUE(contentPrincipal->Is<ContentPrincipal>());
+
+    nsCString origin;
+    ASSERT_NS_SUCCEEDED(contentPrincipal->GetOrigin(origin));
+    EXPECT_EQ(origin, "http://subdomain.example.com:8000"_ns);
+
+    nsCString siteOrigin;
+    ASSERT_NS_SUCCEEDED(contentPrincipal->GetSiteOrigin(siteOrigin));
+    EXPECT_EQ(siteOrigin, "http://example.com"_ns);
+  });
+}
+
+TEST(BackgroundThreadPrincipal, CreateNull)
+{
+  RunOnBackgroundThread([] {
+    nsCOMPtr<nsIURI> contentURI;
+    ASSERT_NS_SUCCEEDED(NS_NewURI(getter_AddRefs(contentURI),
+                                  "data:text/plain,hello world"_ns));
+    RefPtr<BasePrincipal> principal =
+        BasePrincipal::CreateContentPrincipal(contentURI, OriginAttributes());
+    EXPECT_TRUE(principal->Is<NullPrincipal>());
+
+    nsCString origin;
+    ASSERT_NS_SUCCEEDED(principal->GetOrigin(origin));
+    EXPECT_TRUE(StringBeginsWith(origin, "moz-nullprincipal:"_ns));
+  });
+}
+
+TEST(BackgroundThreadPrincipal, PrincipalInfoConversions)
+{
+  RunOnBackgroundThread([] {
+    nsCOMPtr<nsIURI> contentURI;
+    ASSERT_NS_SUCCEEDED(NS_NewURI(getter_AddRefs(contentURI),
+                                  "http://subdomain.example.com:8000"_ns));
+    RefPtr<BasePrincipal> contentPrincipal =
+        BasePrincipal::CreateContentPrincipal(contentURI, OriginAttributes());
+    EXPECT_TRUE(contentPrincipal->Is<ContentPrincipal>());
+
+    ipc::PrincipalInfo info;
+    ASSERT_NS_SUCCEEDED(ipc::PrincipalToPrincipalInfo(contentPrincipal, &info));
+
+    EXPECT_TRUE(info.type() == ipc::PrincipalInfo::TContentPrincipalInfo);
+    EXPECT_EQ(info.get_ContentPrincipalInfo().spec(),
+              "http://subdomain.example.com:8000/"_ns);
+    EXPECT_EQ(info.get_ContentPrincipalInfo().baseDomain(), "example.com"_ns);
+
+    auto result = PrincipalInfoToPrincipal(info);
+    ASSERT_TRUE(result.isOk());
+    nsCOMPtr<nsIPrincipal> deserialized = result.unwrap();
+    EXPECT_TRUE(deserialized->GetIsContentPrincipal());
+
+    EXPECT_TRUE(deserialized->Equals(contentPrincipal));
+  });
+}
+
+}  // namespace mozilla
diff --git a/caps/tests/gtest/TestNullPrincipalPrecursor.cpp b/caps/tests/gtest/TestNullPrincipalPrecursor.cpp
new file mode 100644
index 0000000000..96db5aeffd
--- /dev/null
+++ b/caps/tests/gtest/TestNullPrincipalPrecursor.cpp
@@ -0,0 +1,56 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/gtest/MozAssertions.h"
+#include "mozilla/NullPrincipal.h"
+#include "nsIURIMutator.h"
+#include "nsPrintfCString.h"
+
+namespace mozilla {
+
+TEST(NullPrincipalPrecursor, EscapingRoundTrips)
+{
+  nsTArray<nsCString> inputs;
+
+  inputs.AppendElements(mozilla::Span(std::array{
+      "mailbox:///dev/shm/tmp5wkt9ff_.mozrunner/Mail/Local%20Folders/secure-mail?number=5"_ns,
+  }));
+
+  // Add a string for every ASCII byte both escaped and unescaped.
+  for (uint8_t c = 0; c < 128; ++c) {
+    inputs.AppendElement(nsPrintfCString("%02X: %c", c, (char)c));
+    inputs.AppendElement(nsPrintfCString("%02X: %%%02X", c, c));
+  }
+
+  nsID dummyID{0xddf15eaf,
+               0x3837,
+               0x4678,
+               {0x80, 0x3b, 0x86, 0x86, 0xe8, 0x17, 0x66, 0x71}};
+  nsCOMPtr<nsIURI> baseURI = NullPrincipal::CreateURI(nullptr, &dummyID);
+  ASSERT_TRUE(baseURI);
+
+  for (auto& input : inputs) {
+    // First build an escaped version of the input string using
+    // `EscapePrecursorQuery`.
+    nsCString escaped(input);
+    NullPrincipal::EscapePrecursorQuery(escaped);
+
+    // Make sure that this escaped URI round-trips through a `moz-nullprincipal`
+    // URI's query without any additional escapes.
+    nsCOMPtr<nsIURI> clone;
+    EXPECT_NS_SUCCEEDED(
+        NS_MutateURI(baseURI).SetQuery(escaped).Finalize(clone));
+    nsCString query;
+    EXPECT_NS_SUCCEEDED(clone->GetQuery(query));
+    EXPECT_EQ(escaped, query);
+
+    // Try to unescape our escaped URI and make sure we recover the input
+    // string.
+    nsCString unescaped(escaped);
+    NullPrincipal::UnescapePrecursorQuery(unescaped);
+    EXPECT_EQ(input, unescaped);
+  }
+}
+
+}  // namespace mozilla
diff --git a/caps/tests/gtest/TestOriginAttributes.cpp b/caps/tests/gtest/TestOriginAttributes.cpp
new file mode 100644
index 0000000000..fa759f80d5
--- /dev/null
+++ b/caps/tests/gtest/TestOriginAttributes.cpp
@@ -0,0 +1,118 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/Preferences.h"
+#include "nsNetUtil.h"
+
+using mozilla::OriginAttributes;
+using mozilla::Preferences;
+
+#define FPI_PREF "privacy.firstparty.isolate"
+#define SITE_PREF "privacy.firstparty.isolate.use_site"
+
+#define TEST_FPD(_spec, _expected) \
+  TestFPD(nsLiteralString(_spec), nsLiteralString(_expected))
+
+namespace mozilla {
+
+static void TestSuffix(const OriginAttributes& attrs) {
+  nsAutoCString suffix;
+  attrs.CreateSuffix(suffix);
+
+  OriginAttributes attrsFromSuffix;
+  bool success = attrsFromSuffix.PopulateFromSuffix(suffix);
+  EXPECT_TRUE(success);
+
+  EXPECT_EQ(attrs, attrsFromSuffix);
+}
+
+static void TestFPD(const nsAString& spec, const nsAString& expected) {
+  OriginAttributes attrs;
+  nsCOMPtr<nsIURI> url;
+  ASSERT_EQ(NS_NewURI(getter_AddRefs(url), spec), NS_OK);
+  attrs.SetFirstPartyDomain(true, url);
+  EXPECT_TRUE(attrs.mFirstPartyDomain.Equals(expected));
+
+  TestSuffix(attrs);
+}
+
+TEST(OriginAttributes, Suffix_default)
+{
+  OriginAttributes attrs;
+  TestSuffix(attrs);
+}
+
+TEST(OriginAttributes, Suffix_inIsolatedMozBrowser)
+{
+  OriginAttributes attrs(true);
+  TestSuffix(attrs);
+}
+
+TEST(OriginAttributes, FirstPartyDomain_default)
+{
+  bool oldFpiPref = Preferences::GetBool(FPI_PREF);
+  Preferences::SetBool(FPI_PREF, true);
+  bool oldSitePref = Preferences::GetBool(SITE_PREF);
+  Preferences::SetBool(SITE_PREF, false);
+
+  TEST_FPD(u"http://www.example.com", u"example.com");
+  TEST_FPD(u"http://www.example.com:80", u"example.com");
+  TEST_FPD(u"http://www.example.com:8080", u"example.com");
+  TEST_FPD(u"http://s3.amazonaws.com", u"s3.amazonaws.com");
+  TEST_FPD(u"http://com", u"com");
+  TEST_FPD(u"http://com.", u"com.");
+  TEST_FPD(u"http://com:8080", u"com");
+  TEST_FPD(u"http://.com", u"");
+  TEST_FPD(u"http://..com", u"");
+  TEST_FPD(u"http://127.0.0.1", u"127.0.0.1");
+  TEST_FPD(u"http://[::1]", u"[::1]");
+  TEST_FPD(u"about:config",
+           u"about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla");
+  TEST_FPD(u"moz-extension://f5b6ca10-5bd4-4ed6-9baf-820dc5152bc1", u"");
+  TEST_FPD(u"moz-nullprincipal:{9bebdabb-828a-4284-8b00-432a968c6e42}",
+           u"9bebdabb-828a-4284-8b00-432a968c6e42.mozilla");
+  TEST_FPD(
+      u"moz-nullprincipal:{9bebdabb-828a-4284-8b00-432a968c6e42}"
+      u"?https://www.example.com",
+      u"9bebdabb-828a-4284-8b00-432a968c6e42.mozilla");
+
+  Preferences::SetBool(FPI_PREF, oldFpiPref);
+  Preferences::SetBool(SITE_PREF, oldSitePref);
+}
+
+TEST(OriginAttributes, FirstPartyDomain_site)
+{
+  bool oldFpiPref = Preferences::GetBool(FPI_PREF);
+  Preferences::SetBool(FPI_PREF, true);
+  bool oldSitePref = Preferences::GetBool(SITE_PREF);
+  Preferences::SetBool(SITE_PREF, true);
+
+  TEST_FPD(u"http://www.example.com", u"(http,example.com)");
+  TEST_FPD(u"http://www.example.com:80", u"(http,example.com)");
+  TEST_FPD(u"http://www.example.com:8080", u"(http,example.com)");
+  TEST_FPD(u"http://s3.amazonaws.com", u"(http,s3.amazonaws.com)");
+  TEST_FPD(u"http://com", u"(http,com)");
+  TEST_FPD(u"http://com.", u"(http,com.)");
+  TEST_FPD(u"http://com:8080", u"(http,com,8080)");
+  TEST_FPD(u"http://.com", u"(http,.com)");
+  TEST_FPD(u"http://..com", u"(http,..com)");
+  TEST_FPD(u"http://127.0.0.1", u"(http,127.0.0.1)");
+  TEST_FPD(u"http://[::1]", u"(http,[::1])");
+  TEST_FPD(u"about:config",
+           u"(about,about.ef2a7dd5-93bc-417f-a698-142c3116864f.mozilla)");
+  TEST_FPD(u"moz-extension://f5b6ca10-5bd4-4ed6-9baf-820dc5152bc1", u"");
+  TEST_FPD(u"moz-nullprincipal:{9bebdabb-828a-4284-8b00-432a968c6e42}",
+           u"9bebdabb-828a-4284-8b00-432a968c6e42.mozilla");
+  TEST_FPD(
+      u"moz-nullprincipal:{9bebdabb-828a-4284-8b00-432a968c6e42}"
+      u"?https://www.example.com",
+      u"9bebdabb-828a-4284-8b00-432a968c6e42.mozilla");
+
+  Preferences::SetBool(FPI_PREF, oldFpiPref);
+  Preferences::SetBool(SITE_PREF, oldSitePref);
+}
+
+}  // namespace mozilla
diff --git a/caps/tests/gtest/TestPrincipalAttributes.cpp b/caps/tests/gtest/TestPrincipalAttributes.cpp
new file mode 100644
index 0000000000..bc0bff90f6
--- /dev/null
+++ b/caps/tests/gtest/TestPrincipalAttributes.cpp
@@ -0,0 +1,39 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/BasePrincipal.h"
+#include "nsScriptSecurityManager.h"
+
+using namespace mozilla;
+
+class PrincipalAttributesParam {
+ public:
+  nsAutoCString spec;
+  bool expectIsIpAddress;
+};
+
+class PrincipalAttributesTest
+    : public ::testing::TestWithParam<PrincipalAttributesParam> {};
+
+TEST_P(PrincipalAttributesTest, PrincipalAttributesTest) {
+  nsCOMPtr<nsIScriptSecurityManager> ssm =
+      nsScriptSecurityManager::GetScriptSecurityManager();
+
+  nsAutoCString spec(GetParam().spec);
+  nsCOMPtr<nsIPrincipal> principal;
+  nsresult rv =
+      ssm->CreateContentPrincipalFromOrigin(spec, getter_AddRefs(principal));
+  ASSERT_EQ(rv, NS_OK);
+
+  ASSERT_EQ(principal->GetIsIpAddress(), GetParam().expectIsIpAddress);
+}
+
+static const PrincipalAttributesParam kAttributes[] = {
+    {nsAutoCString("https://mozilla.com"), false},
+    {nsAutoCString("https://127.0.0.1"), true},
+    {nsAutoCString("https://[::1]"), true},
+};
+
+INSTANTIATE_TEST_SUITE_P(TestPrincipalAttributes, PrincipalAttributesTest,
+                         ::testing::ValuesIn(kAttributes));
diff --git a/caps/tests/gtest/TestPrincipalSerialization.cpp b/caps/tests/gtest/TestPrincipalSerialization.cpp
new file mode 100644
index 0000000000..159cf1c269
--- /dev/null
+++ b/caps/tests/gtest/TestPrincipalSerialization.cpp
@@ -0,0 +1,214 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/Base64.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/ContentPrincipal.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/SystemPrincipal.h"
+#include "mozilla/ExpandedPrincipal.h"
+
+using mozilla::BasePrincipal;
+using mozilla::ContentPrincipal;
+using mozilla::NullPrincipal;
+using mozilla::SystemPrincipal;
+
+// None of these tests work in debug due to assert guards
+#ifndef MOZ_DEBUG
+
+// calling toJson() twice with the same string arg
+// (ensure that we truncate correctly where needed)
+TEST(PrincipalSerialization, ReusedJSONArgument)
+{
+  nsCOMPtr<nsIScriptSecurityManager> ssm =
+      nsScriptSecurityManager::GetScriptSecurityManager();
+
+  nsAutoCString spec("https://mozilla.com");
+  nsCOMPtr<nsIPrincipal> principal;
+  nsresult rv =
+      ssm->CreateContentPrincipalFromOrigin(spec, getter_AddRefs(principal));
+  ASSERT_EQ(rv, NS_OK);
+
+  nsAutoCString JSON;
+  rv = BasePrincipal::Cast(principal)->ToJSON(JSON);
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_TRUE(JSON.EqualsLiteral("{\"1\":{\"0\":\"https://mozilla.com/\"}}"));
+
+  nsAutoCString spec2("https://example.com");
+  nsCOMPtr<nsIPrincipal> principal2;
+  rv = ssm->CreateContentPrincipalFromOrigin(spec2, getter_AddRefs(principal2));
+  ASSERT_EQ(rv, NS_OK);
+
+  // Reuse JSON without truncation to check the code is doing this
+  rv = BasePrincipal::Cast(principal2)->ToJSON(JSON);
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_TRUE(JSON.EqualsLiteral("{\"1\":{\"0\":\"https://example.com/\"}}"));
+}
+
+// Assure that calling FromProperties() with an empty array list always returns
+// a nullptr The exception here is SystemPrincipal which doesn't have fields but
+// it also doesn't implement FromProperties These are overly cautious checks
+// that we don't try to create a principal in reality FromProperties is only
+// called with a populated array.
+TEST(PrincipalSerialization, FromPropertiesEmpty)
+{
+  nsTArray<ContentPrincipal::KeyVal> resContent;
+  nsCOMPtr<nsIPrincipal> contentPrincipal =
+      ContentPrincipal::FromProperties(resContent);
+  ASSERT_EQ(nullptr, contentPrincipal);
+
+  nsTArray<ExpandedPrincipal::KeyVal> resExpanded;
+  nsCOMPtr<nsIPrincipal> expandedPrincipal =
+      ExpandedPrincipal::FromProperties(resExpanded);
+  ASSERT_EQ(nullptr, expandedPrincipal);
+
+  nsTArray<NullPrincipal::KeyVal> resNull;
+  nsCOMPtr<nsIPrincipal> nullprincipal = NullPrincipal::FromProperties(resNull);
+  ASSERT_EQ(nullptr, nullprincipal);
+}
+
+// Double check that if we have two valid principals in a serialized JSON that
+// nullptr is returned
+TEST(PrincipalSerialization, TwoKeys)
+{
+  // Sanity check that this returns a system principal
+  nsCOMPtr<nsIPrincipal> systemPrincipal =
+      BasePrincipal::FromJSON("{\"3\":{}}"_ns);
+  ASSERT_EQ(BasePrincipal::Cast(systemPrincipal)->Kind(),
+            BasePrincipal::eSystemPrincipal);
+
+  // Sanity check that this returns a content principal
+  nsCOMPtr<nsIPrincipal> contentPrincipal =
+      BasePrincipal::FromJSON("{\"1\":{\"0\":\"https://mozilla.com\"}}"_ns);
+  ASSERT_EQ(BasePrincipal::Cast(contentPrincipal)->Kind(),
+            BasePrincipal::eContentPrincipal);
+
+  // Check both combined don't return a principal
+  nsCOMPtr<nsIPrincipal> combinedPrincipal = BasePrincipal::FromJSON(
+      "{\"1\":{\"0\":\"https://mozilla.com\"},\"3\":{}}"_ns);
+  ASSERT_EQ(nullptr, combinedPrincipal);
+}
+
+#endif  // ifndef MOZ_DEBUG
+
+TEST(PrincipalSerialization, ExpandedPrincipal)
+{
+  // Check basic Expandedprincipal works without OA
+  nsCOMPtr<nsIScriptSecurityManager> ssm =
+      nsScriptSecurityManager::GetScriptSecurityManager();
+
+  uint32_t length = 2;
+  nsTArray<nsCOMPtr<nsIPrincipal> > allowedDomains(length);
+  allowedDomains.SetLength(length);
+
+  nsAutoCString spec("https://mozilla.com");
+  nsCOMPtr<nsIPrincipal> principal;
+  nsresult rv =
+      ssm->CreateContentPrincipalFromOrigin(spec, getter_AddRefs(principal));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principal)->Kind(),
+            BasePrincipal::eContentPrincipal);
+  allowedDomains[0] = principal;
+
+  nsAutoCString spec2("https://mozilla.org");
+  nsCOMPtr<nsIPrincipal> principal2;
+  rv = ssm->CreateContentPrincipalFromOrigin(spec2, getter_AddRefs(principal2));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principal2)->Kind(),
+            BasePrincipal::eContentPrincipal);
+  allowedDomains[1] = principal2;
+
+  mozilla::OriginAttributes attrs;
+  RefPtr<ExpandedPrincipal> result =
+      ExpandedPrincipal::Create(allowedDomains, attrs);
+  ASSERT_EQ(BasePrincipal::Cast(result)->Kind(),
+            BasePrincipal::eExpandedPrincipal);
+
+  nsAutoCString JSON;
+  rv = BasePrincipal::Cast(result)->ToJSON(JSON);
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_STREQ(JSON.get(),
+               "{\"2\":{\"0\":[{\"1\":{\"0\":\"https://mozilla.com/"
+               "\"}},{\"1\":{\"0\":\"https://mozilla.org/\"}}]}}");
+
+  nsCOMPtr<nsIPrincipal> returnedPrincipal = BasePrincipal::FromJSON(JSON);
+  auto outPrincipal = BasePrincipal::Cast(returnedPrincipal);
+  ASSERT_EQ(outPrincipal->Kind(), BasePrincipal::eExpandedPrincipal);
+
+  ASSERT_TRUE(outPrincipal->FastSubsumesIgnoringFPD(principal));
+  ASSERT_TRUE(outPrincipal->FastSubsumesIgnoringFPD(principal2));
+
+  nsAutoCString specDev("https://mozilla.dev");
+  nsCOMPtr<nsIPrincipal> principalDev;
+  rv = ssm->CreateContentPrincipalFromOrigin(specDev,
+                                             getter_AddRefs(principalDev));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principalDev)->Kind(),
+            BasePrincipal::eContentPrincipal);
+
+  ASSERT_FALSE(outPrincipal->FastSubsumesIgnoringFPD(principalDev));
+}
+
+TEST(PrincipalSerialization, ExpandedPrincipalOA)
+{
+  // Check Expandedprincipal works with top level OA
+  nsCOMPtr<nsIScriptSecurityManager> ssm =
+      nsScriptSecurityManager::GetScriptSecurityManager();
+
+  uint32_t length = 2;
+  nsTArray<nsCOMPtr<nsIPrincipal> > allowedDomains(length);
+  allowedDomains.SetLength(length);
+
+  nsAutoCString spec("https://mozilla.com");
+  nsCOMPtr<nsIPrincipal> principal;
+  nsresult rv =
+      ssm->CreateContentPrincipalFromOrigin(spec, getter_AddRefs(principal));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principal)->Kind(),
+            BasePrincipal::eContentPrincipal);
+  allowedDomains[0] = principal;
+
+  nsAutoCString spec2("https://mozilla.org");
+  nsCOMPtr<nsIPrincipal> principal2;
+  rv = ssm->CreateContentPrincipalFromOrigin(spec2, getter_AddRefs(principal2));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principal2)->Kind(),
+            BasePrincipal::eContentPrincipal);
+  allowedDomains[1] = principal2;
+
+  mozilla::OriginAttributes attrs;
+  nsAutoCString suffix("^userContextId=1");
+  bool ok = attrs.PopulateFromSuffix(suffix);
+  ASSERT_TRUE(ok);
+
+  RefPtr<ExpandedPrincipal> result =
+      ExpandedPrincipal::Create(allowedDomains, attrs);
+  ASSERT_EQ(BasePrincipal::Cast(result)->Kind(),
+            BasePrincipal::eExpandedPrincipal);
+
+  nsAutoCString JSON;
+  rv = BasePrincipal::Cast(result)->ToJSON(JSON);
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_STREQ(JSON.get(),
+               "{\"2\":{\"0\":[{\"1\":{\"0\":\"https://mozilla.com/"
+               "\"}},{\"1\":{\"0\":\"https://mozilla.org/"
+               "\"}}],\"1\":\"^userContextId=1\"}}");
+
+  nsCOMPtr<nsIPrincipal> returnedPrincipal = BasePrincipal::FromJSON(JSON);
+  auto outPrincipal = BasePrincipal::Cast(returnedPrincipal);
+  ASSERT_EQ(outPrincipal->Kind(), BasePrincipal::eExpandedPrincipal);
+
+  ASSERT_TRUE(outPrincipal->FastSubsumesIgnoringFPD(principal));
+  ASSERT_TRUE(outPrincipal->FastSubsumesIgnoringFPD(principal2));
+
+  nsAutoCString specDev("https://mozilla.dev");
+  nsCOMPtr<nsIPrincipal> principalDev;
+  rv = ssm->CreateContentPrincipalFromOrigin(specDev,
+                                             getter_AddRefs(principalDev));
+  ASSERT_EQ(rv, NS_OK);
+  ASSERT_EQ(BasePrincipal::Cast(principalDev)->Kind(),
+            BasePrincipal::eContentPrincipal);
+
+  ASSERT_FALSE(outPrincipal->FastSubsumesIgnoringFPD(principalDev));
+}
diff --git a/caps/tests/gtest/TestRedirectChainURITruncation.cpp b/caps/tests/gtest/TestRedirectChainURITruncation.cpp
new file mode 100644
index 0000000000..34c633499c
--- /dev/null
+++ b/caps/tests/gtest/TestRedirectChainURITruncation.cpp
@@ -0,0 +1,231 @@
+/* This Source Code Form is subject to the terms of the Mozilla Public
+ * License, v. 2.0. If a copy of the MPL was not distributed with this
+ * file, You can obtain one at http://mozilla.org/MPL/2.0/. */
+#include "gtest/gtest.h"
+#include "mozilla/BasePrincipal.h"
+#include "mozilla/ContentPrincipal.h"
+#include "mozilla/NullPrincipal.h"
+#include "mozilla/SystemPrincipal.h"
+#include "mozilla/ExpandedPrincipal.h"
+#include "nsContentUtils.h"
+#include "mozilla/LoadInfo.h"
+
+namespace mozilla {
+
+void checkPrincipalTruncation(nsIPrincipal* aPrincipal,
+                              const nsACString& aExpectedSpec = ""_ns,
+                              const nsTArray<nsCString>& aExpectedSpecs = {}) {
+  nsCOMPtr<nsIPrincipal> truncatedPrincipal =
+      net::CreateTruncatedPrincipal(aPrincipal);
+  ASSERT_TRUE(truncatedPrincipal);
+
+  if (aPrincipal->IsSystemPrincipal()) {
+    ASSERT_TRUE(truncatedPrincipal->IsSystemPrincipal());
+    return;
+  }
+
+  if (aPrincipal->GetIsNullPrincipal()) {
+    nsCOMPtr<nsIPrincipal> precursorPrincipal =
+        aPrincipal->GetPrecursorPrincipal();
+
+    nsAutoCString principalSpecEnding("}");
+    nsAutoCString expectedTestSpec(aExpectedSpec);
+    if (!aExpectedSpec.IsEmpty()) {
+      principalSpecEnding += "?"_ns;
+      expectedTestSpec += "/"_ns;
+    }
+
+    if (precursorPrincipal) {
+      nsAutoCString precursorSpec;
+      precursorPrincipal->GetAsciiSpec(precursorSpec);
+      ASSERT_TRUE(precursorSpec.Equals(expectedTestSpec));
+    }
+
+    // NullPrincipals have UUIDs as part of their scheme i.e.
+    // moz-nullprincipal:{9bebdabb-828a-4284-8b00-432a968c6e42}
+    // To avoid having to know the UUID beforehand we check the principal's spec
+    // before and after the UUID
+    nsAutoCString principalSpec;
+    truncatedPrincipal->GetAsciiSpec(principalSpec);
+    ASSERT_TRUE(StringBeginsWith(principalSpec, "moz-nullprincipal:{"_ns));
+    ASSERT_TRUE(
+        StringEndsWith(principalSpec, principalSpecEnding + aExpectedSpec));
+    return;
+  }
+
+  if (aPrincipal->GetIsExpandedPrincipal()) {
+    const nsTArray<nsCOMPtr<nsIPrincipal>>& truncatedAllowList =
+        BasePrincipal::Cast(truncatedPrincipal)
+            ->As<ExpandedPrincipal>()
+            ->AllowList();
+
+    for (size_t i = 0; i < aExpectedSpecs.Length(); ++i) {
+      nsAutoCString principalSpec;
+      truncatedAllowList[i]->GetAsciiSpec(principalSpec);
+      ASSERT_TRUE(principalSpec.Equals(aExpectedSpecs[i]));
+    }
+    return;
+  }
+
+  if (aPrincipal->GetIsContentPrincipal()) {
+    nsAutoCString principalSpec;
+    truncatedPrincipal->GetAsciiSpec(principalSpec);
+    ASSERT_TRUE(principalSpec.Equals(aExpectedSpec));
+    return;
+  }
+
+  // Tests should not reach this point
+  ADD_FAILURE();
+}
+
+void checkPrincipalTruncation(nsIPrincipal* aPrincipal,
+                              const nsTArray<nsCString>& aExpectedSpecs = {}) {
+  checkPrincipalTruncation(aPrincipal, ""_ns, aExpectedSpecs);
+}
+
+TEST(RedirectChainURITruncation, ContentPrincipal)
+{
+  // ======================= HTTP Scheme =======================
+  nsAutoCString httpSpec(
+      "http://root:toor@www.example.com:200/foo/bar/baz.html?qux#thud");
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), httpSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  nsCOMPtr<nsIPrincipal> principal;
+  OriginAttributes attrs;
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal,
+                           "http://www.example.com:200/foo/bar/baz.html"_ns);
+
+  // ======================= HTTPS Scheme =======================
+  nsAutoCString httpsSpec(
+      "https://root:toor@www.example.com:200/foo/bar/baz.html?qux#thud");
+  rv = NS_NewURI(getter_AddRefs(uri), httpsSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal,
+                           "https://www.example.com:200/foo/bar/baz.html"_ns);
+
+  // ======================= View Source Scheme =======================
+  nsAutoCString viewSourceSpec(
+      "view-source:https://root:toor@www.example.com:200/foo/bar/"
+      "baz.html?qux#thud");
+  rv = NS_NewURI(getter_AddRefs(uri), viewSourceSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(
+      principal, "view-source:https://www.example.com:200/foo/bar/baz.html"_ns);
+
+  // ======================= About Scheme =======================
+  nsAutoCString aboutSpec("about:config");
+  rv = NS_NewURI(getter_AddRefs(uri), aboutSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, "about:config"_ns);
+
+  // ======================= Resource Scheme =======================
+  nsAutoCString resourceSpec("resource://testing/");
+  rv = NS_NewURI(getter_AddRefs(uri), resourceSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, "resource://testing/"_ns);
+
+  // ======================= Chrome Scheme =======================
+  nsAutoCString chromeSpec("chrome://foo/content/bar.xul");
+  rv = NS_NewURI(getter_AddRefs(uri), chromeSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  principal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, "chrome://foo/content/bar.xul"_ns);
+}
+
+TEST(RedirectChainURITruncation, NullPrincipal)
+{
+  // ======================= NullPrincipal =======================
+  nsCOMPtr<nsIPrincipal> principal =
+      NullPrincipal::CreateWithoutOriginAttributes();
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, ""_ns);
+
+  // ======================= NullPrincipal & Precursor =======================
+  nsAutoCString precursorSpec(
+      "https://root:toor@www.example.com:200/foo/bar/baz.html?qux#thud");
+
+  nsCOMPtr<nsIURI> precursorURI;
+  nsresult rv = NS_NewURI(getter_AddRefs(precursorURI), precursorSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  OriginAttributes attrs;
+  nsCOMPtr<nsIPrincipal> precursorPrincipal =
+      BasePrincipal::CreateContentPrincipal(precursorURI, attrs);
+  principal = NullPrincipal::CreateWithInheritedAttributes(precursorPrincipal);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, "https://www.example.com:200"_ns);
+}
+
+TEST(RedirectChainURITruncation, SystemPrincipal)
+{
+  nsCOMPtr<nsIPrincipal> principal = nsContentUtils::GetSystemPrincipal();
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, ""_ns);
+}
+
+TEST(RedirectChainURITruncation, ExtendedPrincipal)
+{
+  // ======================= HTTP Scheme =======================
+  nsAutoCString httpSpec(
+      "http://root:toor@www.example.com:200/foo/bar/baz.html?qux#thud");
+  nsCOMPtr<nsIURI> uri;
+  nsresult rv = NS_NewURI(getter_AddRefs(uri), httpSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  nsCOMPtr<nsIPrincipal> firstContentPrincipal;
+  OriginAttributes attrs;
+  firstContentPrincipal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(firstContentPrincipal);
+
+  // ======================= HTTPS Scheme =======================
+  nsCOMPtr<nsIPrincipal> secondContentPrincipal;
+  nsAutoCString httpsSpec(
+      "https://root:toor@www.example.com:200/foo/bar/baz.html?qux#thud");
+  rv = NS_NewURI(getter_AddRefs(uri), httpsSpec);
+  ASSERT_EQ(rv, NS_OK);
+
+  secondContentPrincipal = BasePrincipal::CreateContentPrincipal(uri, attrs);
+  ASSERT_TRUE(secondContentPrincipal);
+
+  // ======================= ExpandedPrincipal =======================
+  const nsTArray<nsCString>& expectedSpecs = {
+      "http://www.example.com:200/foo/bar/baz.html"_ns,
+      "https://www.example.com:200/foo/bar/baz.html"_ns,
+  };
+  nsTArray<nsCOMPtr<nsIPrincipal>> allowList = {firstContentPrincipal,
+                                                secondContentPrincipal};
+  nsCOMPtr<nsIPrincipal> principal =
+      ExpandedPrincipal::Create(allowList, attrs);
+  ASSERT_TRUE(principal);
+
+  checkPrincipalTruncation(principal, expectedSpecs);
+}
+
+}  // namespace mozilla
diff --git a/caps/tests/gtest/moz.build b/caps/tests/gtest/moz.build
new file mode 100644
index 0000000000..10b1a66f3b
--- /dev/null
+++ b/caps/tests/gtest/moz.build
@@ -0,0 +1,18 @@
+# -*- Mode: python; indent-tabs-mode: nil; tab-width: 40 -*-
+# vim: set filetype=python:
+# This Source Code Form is subject to the terms of the Mozilla Public
+# License, v. 2.0. If a copy of the MPL was not distributed with this
+# file, You can obtain one at http://mozilla.org/MPL/2.0/.
+
+UNIFIED_SOURCES += [
+    "TestBackgroundThreadPrincipal.cpp",
+    "TestNullPrincipalPrecursor.cpp",
+    "TestOriginAttributes.cpp",
+    "TestPrincipalAttributes.cpp",
+    "TestPrincipalSerialization.cpp",
+    "TestRedirectChainURITruncation.cpp",
+]
+
+include("/ipc/chromium/chromium-config.mozbuild")
+
+FINAL_LIBRARY = "xul-gtest"